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rhai_engine/examples/loadscripts/scripts/math_utils.rhai

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+// Math utility functions for Tera templates
+
+// Format a number with commas as thousands separators
+fn format_number(num) {
+    let str = num.to_string();
+    let result = "";
+    let len = str.len;
+    
+    for i in 0..len {
+        if i > 0 && (len - i) % 3 == 0 {
+            result += ",";
+        }
+        result += str.substr(i, 1);
+    }
+    
+    result
+}
+
+// Calculate percentage
+fn percentage(value, total) {
+    if total == 0 {
+        return "0%";
+    }
+    
+    let pct = (value / total) * 100.0;
+    pct.round().to_string() + "%"
+}
+
+// Format currency
+fn currency(amount, symbol) {
+    symbol + format_number(amount.round(2))
+}

rhai_engine/examples/loadscripts/scripts/string_utils.rhai

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+// String manipulation functions that will be exposed to Tera templates
+
+// Capitalize the first letter of each word
+fn capitalize(text) {
+    if text.len == 0 {
+        return "";
+    }
+    
+    let words = text.split(" ");
+    let result = [];
+    
+    for word in words {
+        if word.len > 0 {
+            let first_char = word.substr(0, 1).to_upper();
+            let rest = word.substr(1, word.len - 1);
+            result.push(first_char + rest);
+        } else {
+            result.push("");
+        }
+    }
+    
+    result.join(" ")
+}
+
+// Truncate text with ellipsis
+fn truncate(text, max_length) {
+    if text.len <= max_length {
+        return text;
+    }
+    
+    text.substr(0, max_length - 3) + "..."
+}
+
+// Convert text to slug format (lowercase, hyphens)
+fn slugify(text) {
+    let slug = text.to_lower();
+    slug = slug.replace(" ", "-");
+    slug = slug.replace(".", "");
+    slug = slug.replace(",", "");
+    slug = slug.replace("!", "");
+    slug = slug.replace("?", "");
+    slug
+}

rhai_engine/examples/loadscripts/scripts/test_utils.rhai

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+// Test utility functions to verify dynamic function discovery
+// These functions were not in the original hardcoded lists
+
+// Reverse a string
+fn reverse_string(text) {
+    let result = "";
+    let i = text.len - 1;
+    
+    // Using a different approach to reverse the string
+    // We'll iterate backwards with a while loop instead of using step
+    while i >= 0 {
+        result += text.substr(i, 1); 
+        i -= 1;
+    }
+    result
+}
+
+// Count words in a string - rewritten to avoid split issues
+fn count_words(text) {
+    if text.len == 0 {
+        return 0;
+    }
+    
+    // Manual word counting implementation
+    let count = 1; // Start with 1 for the first word
+    let in_word = true;
+    
+    for i in 0..text.len {
+        let char = text.substr(i, 1);
+        
+        if char == " " {
+            in_word = false;
+        } else if !in_word {
+            // Found a non-space after a space = new word
+            count += 1;
+            in_word = true;
+        }
+    }
+    
+    if text.substr(0, 1) == " " {
+        // If text starts with space, reduce count
+        count -= 1;
+    }
+    
+    count
+}
+
+// Calculate factorial
+fn factorial(n) {
+    // Ensure consistent integer type using to_int()
+    let num = n.to_int();
+    if num <= 1 {
+        return 1;
+    }
+    num * factorial(num-1)
+}

rhai_engine/examples/loadscripts/test_dynamic_loading.rs

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+use crate::tera_integration::RhaiTeraIntegration;
+use std::collections::HashMap;
+use rhai::Dynamic;
+
+/// Test the dynamic loading of Rhai scripts and functions
+pub fn test_dynamic_loading() -> Result<(), String> {
+    println!("\n=== TESTING DYNAMIC FUNCTION LOADING ===\n");
+    
+    // Create a new RhaiTeraIntegration
+    let mut integration = RhaiTeraIntegration::new();
+    
+    println!("Loading Rhai scripts...");
+    
+    // Load the original scripts
+    integration.load_script("string_utils", "src/tera_integration/scripts/string_utils.rhai")?;
+    integration.load_script("math_utils", "src/tera_integration/scripts/math_utils.rhai")?;
+    
+    // Load the new test script (which wasn't in the original hardcoded lists)
+    integration.load_script("test_utils", "src/tera_integration/scripts/test_utils.rhai")?;
+    
+    // Get function names
+    let function_names = integration.get_function_names();
+    
+    // Print all available functions
+    println!("\nAll available functions:");
+    for name in &function_names {
+        println!("  - {}", name);
+    }
+    
+    // Group functions by their script prefix to display nicely
+    let scripts = group_functions_by_script(&function_names);
+    
+    // Display functions by script
+    display_functions_by_script(&scripts);
+        
+    // Test some functions from each script
+    println!("\nDynamic function testing:");
+    
+    // Test original string utils functions
+    test_function(&integration, "string_utils:capitalize", vec![Dynamic::from("hello world")])?;
+    
+    // Test original math utils functions
+    test_function(&integration, "math_utils:format_number", vec![Dynamic::from(1234567)])?;
+    
+    // Test new functions from test_utils
+    test_function(&integration, "test_utils:reverse_string", vec![Dynamic::from("hello world")])?;
+    
+    test_function(&integration, "test_utils:count_words", 
+        vec![Dynamic::from("this is a test sentence")])?;
+    
+    test_function(&integration, "test_utils:factorial", 
+        vec![Dynamic::from(5)])?;
+    
+    println!("\n=== DYNAMIC FUNCTION LOADING TEST COMPLETE ===\n");
+    
+    Ok(())
+}
+
+// Helper function to group functions by script
+fn group_functions_by_script(function_names: &[String]) -> HashMap<String, Vec<String>> {
+    let mut scripts = HashMap::new();
+    
+    for name in function_names {
+        let parts: Vec<&str> = name.split(':').collect();
+        if parts.len() == 2 {
+            let script = parts[0].to_string();
+            let func = parts[1].to_string();
+            
+            scripts.entry(script).or_insert_with(Vec::new).push(func);
+        }
+    }
+    
+    scripts
+}
+
+// Helper function to display functions grouped by script
+fn display_functions_by_script(scripts: &HashMap<String, Vec<String>>) {
+    println!("\nFunctions by script:");
+    
+    for (script, funcs) in scripts {
+        println!("  {}:", script);
+        for func in funcs {
+            println!("    - {}", func);
+        }
+    }
+}
+
+// Helper function to test a function and display its result
+fn test_function(integration: &RhaiTeraIntegration, name: &str, args: Vec<Dynamic>) -> Result<(), String> {
+    let result = integration.call_function(name, args)?;
+    println!("  {}() => {}", name, result);
+    Ok(())
+}

rhai_engine/examples/simple/producttemplates/product_catalog.tera

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+# Product Catalog
+
+{% let products = get_products() %}
+
+## All Products
+
+{% for product in products %}
+### {{ product.name }}
+
+**Price:** {{ format_price(product.price) }}
+
+#### Features:
+{% for feature in product.features %}
+- {{ feature }}
+{% endfor %}
+
+*Status: {% if product.available %}✅ In Stock{% else %}❌ Out of Stock{% endif %}*
+
+---
+{% endfor %}
+
+## Available Products
+
+{% let available_products = get_available_products() %}
+*Available Products: {{ available_products.len() }}*
+
+{% for product in available_products %}
+### {{ product.name }}
+
+**Price:** {{ format_price(product.price) }}
+
+---
+{% endfor %}
+
+## Total Catalog Value
+
+**Total Value:** {{ format_price(calculate_total_price()) }}
+
+## User Information
+
+{% let user = get_user() %}
+
+**Name:** {{ user.name }}  
+**Email:** {{ user.email }}  
+**Role:** {{ user.role }}  
+**Theme:** {{ user.settings.theme }}
+
+### Order History
+
+{% for order in user.orders %}
+- **{{ order.id }}** ({{ order.date }}) - {{ format_price(order.total) }}
+{% endfor %}
+
+## All Product Features
+
+{% let features = get_all_features() %}
+{% for feature in features %}
+- {{ feature }}
+{% endfor %}

rhai_engine/examples/simple/producttemplates/readme.md

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+the data objects which need to be filled into product_catalog.tera come from ../scripts/
+

rhai_engine/examples/simple/scriptloader/scripts/data_objects.rhai

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+// Data objects for Tera template integration
+// This script defines complex objects that can be accessed from Tera templates
+
+// Create a products catalog object
+fn create_products() {
+    let products = [
+        #{
+            id: 1,
+            name: "Laptop",
+            price: 1299.99,
+            features: [
+                "16GB RAM",
+                "512GB SSD",
+                "Intel i7 processor"
+            ],
+            available: true
+        },
+        #{
+            id: 2,
+            name: "Smartphone",
+            price: 899.99,
+            features: [
+                "6.7 inch display",
+                "128GB storage",
+                "12MP camera"
+            ],
+            available: true
+        },
+        #{
+            id: 3,
+            name: "Tablet",
+            price: 499.99,
+            features: [
+                "10.9 inch display",
+                "64GB storage",
+                "A14 chip"
+            ],
+            available: false
+        },
+        #{
+            id: 4,
+            name: "Headphones",
+            price: 249.99,
+            features: [
+                "Noise cancellation",
+                "Wireless",
+                "20h battery life"
+            ],
+            available: true
+        }
+    ];
+    
+    products
+}
+
+// Get all products
+fn get_products() {
+    create_products()
+}
+
+// Get available products only
+fn get_available_products() {
+    let all_products = create_products();
+    let available = [];
+    
+    for product in all_products {
+        if product.available {
+            available.push(product);
+        }
+    }
+    
+    available
+}
+
+// Get a specific product by ID
+fn get_product_by_id(id) {
+    let products = create_products();
+    
+    // Convert ID to integer to ensure type compatibility
+    let search_id = id.to_int();
+    
+    for product in products {
+        if product.id == search_id {
+            return product;
+        }
+    }
+    
+    #{}  // Return empty object if not found
+}
+
+// Calculate total price of all products
+fn calculate_total_price() {
+    let products = create_products();
+    let total = 0.0;
+    
+    for product in products {
+        total += product.price;
+    }
+    
+    total
+}
+
+// Format price with currency symbol
+fn format_price(price) {
+    "$" + price.to_string()
+}
+
+// Get all product features as a flattened array
+fn get_all_features() {
+    let products = create_products();
+    let all_features = [];
+    
+    for product in products {
+        for feature in product.features {
+            all_features.push(feature);
+        }
+    }
+    
+    all_features
+}
+
+// Get a user object
+fn get_user() {
+    #{
+        name: "John Doe",
+        email: "john@example.com",
+        role: "admin",
+        settings: #{
+            theme: "dark",
+            notifications: true,
+            language: "en"
+        },
+        orders: [
+            #{
+                id: "ORD-001",
+                date: "2025-03-25",
+                total: 1299.99
+            },
+            #{
+                id: "ORD-002",
+                date: "2025-04-01",
+                total: 249.99
+            }
+        ]
+    }
+}